1 /* 2 * Copyright (c) 1988, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)main.c 8.3 (Berkeley) 5/30/95 30 * $FreeBSD: src/crypto/telnet/telnet/main.c,v 1.4.2.5 2002/04/13 10:59:08 markm Exp $ 31 */ 32 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 #include <stdlib.h> 36 #include <string.h> 37 #include <unistd.h> 38 39 #include "ring.h" 40 #include "externs.h" 41 #include "defines.h" 42 43 #ifdef AUTHENTICATION 44 #include <libtelnet/auth.h> 45 #endif 46 #ifdef ENCRYPTION 47 #include <libtelnet/encrypt.h> 48 #endif 49 50 /* These values need to be the same as defined in libtelnet/kerberos5.c */ 51 /* Either define them in both places, or put in some common header file. */ 52 #define OPTS_FORWARD_CREDS 0x00000002 53 #define OPTS_FORWARDABLE_CREDS 0x00000001 54 55 #if 0 56 #define FORWARD 57 #endif 58 59 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 60 char *ipsec_policy_in = NULL; 61 char *ipsec_policy_out = NULL; 62 #endif 63 64 int family = AF_UNSPEC; 65 66 /* 67 * Initialize variables. 68 */ 69 void 70 tninit(void) 71 { 72 init_terminal(); 73 74 init_network(); 75 76 init_telnet(); 77 78 init_sys(); 79 } 80 81 static void 82 usage(void) 83 { 84 fprintf(stderr, "Usage: %s %s%s%s%s\n", 85 prompt, 86 #ifdef AUTHENTICATION 87 "[-4] [-6] [-8] [-E] [-K] [-L] [-N] [-S tos] [-X atype] [-c] [-d]", 88 "\n\t[-e char] [-k realm] [-l user] [-f/-F] [-n tracefile] ", 89 #else 90 "[-4] [-6] [-8] [-E] [-L] [-N] [-S tos] [-c] [-d]", 91 "\n\t[-e char] [-l user] [-n tracefile] ", 92 #endif 93 "[-r] [-s src_addr] [-u] ", 94 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 95 "[-P policy] " 96 #endif 97 #ifdef ENCRYPTION 98 "[-y] [host-name [port]]" 99 #else /* ENCRYPTION */ 100 "[host-name [port]]" 101 #endif /* ENCRYPTION */ 102 ); 103 exit(1); 104 } 105 106 /* 107 * main. Parse arguments, invoke the protocol or command parser. 108 */ 109 110 int 111 main(int argc, char *argv[]) 112 { 113 int ch; 114 char *user; 115 char *src_addr = NULL; 116 #ifdef FORWARD 117 extern int forward_flags; 118 #endif /* FORWARD */ 119 120 tninit(); /* Clear out things */ 121 122 TerminalSaveState(); 123 124 if ((prompt = strrchr(argv[0], '/'))) 125 ++prompt; 126 else 127 prompt = argv[0]; 128 129 user = NULL; 130 131 rlogin = (strncmp(prompt, "rlog", 4) == 0) ? '~' : _POSIX_VDISABLE; 132 #ifdef AUTHENTICATION 133 autologin = 0; 134 #else 135 autologin = -1; 136 #endif 137 138 #ifdef ENCRYPTION 139 encrypt_auto(1); 140 decrypt_auto(1); 141 #endif 142 143 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 144 #define IPSECOPT "P:" 145 #else 146 #define IPSECOPT 147 #endif 148 while ((ch = getopt(argc, argv, 149 "468EKLNS:X:acde:fFk:l:n:rs:t:uxy" IPSECOPT)) != -1) 150 #undef IPSECOPT 151 { 152 switch(ch) { 153 case '4': 154 family = AF_INET; 155 break; 156 #ifdef INET6 157 case '6': 158 family = AF_INET6; 159 break; 160 #endif 161 case '8': 162 eight = 3; /* binary output and input */ 163 break; 164 case 'E': 165 rlogin = escape = _POSIX_VDISABLE; 166 break; 167 case 'K': 168 #ifdef AUTHENTICATION 169 /* It's the default now, so ignore */ 170 #endif 171 break; 172 case 'L': 173 eight |= 2; /* binary output only */ 174 break; 175 case 'N': 176 doaddrlookup = 0; 177 break; 178 case 'S': 179 { 180 #ifdef HAS_GETTOS 181 extern int tos; 182 183 if ((tos = parsetos(optarg, "tcp")) < 0) 184 fprintf(stderr, "%s%s%s%s\n", 185 prompt, ": Bad TOS argument '", 186 optarg, 187 "; will try to use default TOS"); 188 #else 189 fprintf(stderr, 190 "%s: Warning: -S ignored, no parsetos() support.\n", 191 prompt); 192 #endif 193 } 194 break; 195 case 'X': 196 #ifdef AUTHENTICATION 197 auth_disable_name(optarg); 198 #endif 199 break; 200 case 'a': 201 autologin = 1; 202 break; 203 case 'c': 204 skiprc = 1; 205 break; 206 case 'd': 207 telnet_debug = 1; 208 break; 209 case 'e': 210 set_escape_char(optarg); 211 break; 212 case 'f': 213 #ifdef AUTHENTICATION 214 #if defined(KRB5) && defined(FORWARD) 215 if (forward_flags & OPTS_FORWARD_CREDS) { 216 fprintf(stderr, 217 "%s: Only one of -f and -F allowed.\n", 218 prompt); 219 usage(); 220 } 221 forward_flags |= OPTS_FORWARD_CREDS; 222 #else 223 fprintf(stderr, 224 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 225 prompt); 226 #endif 227 #else 228 fprintf(stderr, 229 "%s: Warning: -f ignored, no Kerberos V5 support.\n", 230 prompt); 231 #endif 232 break; 233 case 'F': 234 #ifdef AUTHENTICATION 235 #if defined(KRB5) && defined(FORWARD) 236 if (forward_flags & OPTS_FORWARD_CREDS) { 237 fprintf(stderr, 238 "%s: Only one of -f and -F allowed.\n", 239 prompt); 240 usage(); 241 } 242 forward_flags |= OPTS_FORWARD_CREDS; 243 forward_flags |= OPTS_FORWARDABLE_CREDS; 244 #else 245 fprintf(stderr, 246 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 247 prompt); 248 #endif 249 #else 250 fprintf(stderr, 251 "%s: Warning: -F ignored, no Kerberos V5 support.\n", 252 prompt); 253 #endif 254 break; 255 case 'k': 256 #ifdef AUTHENTICATION 257 #if defined(KRB4) 258 { 259 extern char *dest_realm, dst_realm_buf[], dst_realm_sz; 260 dest_realm = dst_realm_buf; 261 (void)strncpy(dest_realm, optarg, dst_realm_sz); 262 } 263 #else 264 fprintf(stderr, 265 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 266 prompt); 267 #endif 268 #else 269 fprintf(stderr, 270 "%s: Warning: -k ignored, no Kerberos V4 support.\n", 271 prompt); 272 #endif 273 break; 274 case 'l': 275 #ifdef AUTHENTICATION 276 /* This is the default now, so ignore it */ 277 #else 278 autologin = 1; 279 #endif 280 user = optarg; 281 break; 282 case 'n': 283 SetNetTrace(optarg); 284 break; 285 case 'r': 286 rlogin = '~'; 287 break; 288 case 's': 289 src_addr = optarg; 290 break; 291 case 'u': 292 family = AF_UNIX; 293 break; 294 case 'x': 295 #ifndef ENCRYPTION 296 fprintf(stderr, 297 "%s: Warning: -x ignored, no ENCRYPT support.\n", 298 prompt); 299 #endif /* ENCRYPTION */ 300 break; 301 case 'y': 302 #ifdef ENCRYPTION 303 encrypt_auto(0); 304 decrypt_auto(0); 305 #else 306 fprintf(stderr, 307 "%s: Warning: -y ignored, no ENCRYPT support.\n", 308 prompt); 309 #endif /* ENCRYPTION */ 310 break; 311 #if defined(IPSEC) && defined(IPSEC_POLICY_IPSEC) 312 case 'P': 313 if (!strncmp("in", optarg, 2)) 314 ipsec_policy_in = strdup(optarg); 315 else if (!strncmp("out", optarg, 3)) 316 ipsec_policy_out = strdup(optarg); 317 else 318 usage(); 319 break; 320 #endif 321 case '?': 322 default: 323 usage(); 324 /* NOTREACHED */ 325 } 326 } 327 if (autologin == -1) 328 autologin = (rlogin == _POSIX_VDISABLE) ? 0 : 1; 329 330 argc -= optind; 331 argv += optind; 332 333 if (argc) { 334 char *args[9], **argp = args; 335 336 if (argc > 2) 337 usage(); 338 *argp++ = prompt; 339 if (user) { 340 *argp++ = strdup("-l"); 341 *argp++ = user; 342 } 343 if (src_addr) { 344 *argp++ = strdup("-s"); 345 *argp++ = src_addr; 346 } 347 *argp++ = argv[0]; /* host */ 348 if (argc > 1) 349 *argp++ = argv[1]; /* port */ 350 *argp = NULL; 351 352 if (setjmp(toplevel) != 0) 353 Exit(0); 354 if (tn(argp - args, args) == 1) 355 return (0); 356 else 357 return (1); 358 } 359 (void)setjmp(toplevel); 360 for (;;) { 361 command(1, 0, 0); 362 } 363 return 0; 364 } 365